Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 21, Problem 10SQ
_____ is produced from red algae.
- a. Diatomaceous earth
- b. Chert
- c. Carrageenan
- d. both b and c
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Like plants,_______ have chlorophylls a and b. a. diatoms c. green algae b. red algae d. giant kelps
Decomposers
a. break down dead organic matter in the environment by secreting digestive enzymes.
b. break down living organic matter by secreting digestive enzymes.
c. destroy living cells and then break them down with digestive enzymes.
d. live in close association with another species.
All algae havea) chlorophyll a. b) cell walls that contain agar.c) holdfasts. d) red tides.
Chapter 21 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 21 - Multicelled haploid and diploid bodies form in...Ch. 21 - The __________ of diplomonads and parabasalids...Ch. 21 - Radiolaria and diatoms have a shell of _______. a....Ch. 21 - Prob. 4SQCh. 21 - Prob. 1DAACh. 21 - Prob. 2DAACh. 21 - Prob. 3DAACh. 21 - Prob. 4DAACh. 21 - Diatoms produce _______ that help(s) them float....Ch. 21 - Prob. 6SQ
Ch. 21 - Green algae are most closely related to _____. a....Ch. 21 - Prob. 8SQCh. 21 - Which species does not cause human disease? a....Ch. 21 - _____ is produced from red algae. a. Diatomaceous...Ch. 21 - Prob. 11SQCh. 21 - Prob. 12SQCh. 21 - Prob. 13SQCh. 21 - Prob. 14SQCh. 21 - Match each term with its most suitable...Ch. 21 - Which groups or protists would you be most likely...Ch. 21 - Prob. 2CTCh. 21 - Prob. 3CT
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- Humusa. supplies nutrients to plants.b. is basic in its pH.c. is found in the deepest soil horizons.d. is inorganic in origin.arrow_forwardWhich of the following is NOT a unicelled organism? a. amoeba b. bacteria c. paramecium d. fungiarrow_forwardit is discovered that the algae-killing product (AlgaeBdead) that spilled in Lake Ontario also inhibits (slows) the growth of fungi in the lake. Explain one way this would negatively affect the lake ecosystem.arrow_forward
- Which of these occurs through symbiotic nitrogen fixation? a. The plant benefits from using an endless source of nitrogen. b. The soil benefits from being naturally fertilized. c. Bacteria benefit from using photosynthates from the plant. d. All of the above occur.arrow_forwardAlmost all of the oxygen gas in today’s atmosphere ispresent as a result ofa. outgassing from volcanoes.b. aerobic respiration.c. endosymbiosis.d. photosynthesis.arrow_forwardWhy are fungal insecticides an attractive alternative to chemical pesticides for growing food crops? a. Human consumption of fungal insecticides would not make a person sick, but ingestion of chemical pesticides can be harmful to humans. b. A single fungal insecticide would kill a wider variety of insects than a chemical pesticide. c. Fungal insecticides can eliminate both harmful insects and plant pathogens, while chemical pesticides only kill insects. d. Fungal insecticides will decompose dying plants, enhancing the nitrogen content of the soil, while chemical pesticides are not decomposers.arrow_forward
- Decomposing organic matter in soil is called ______ a. clay b. humus c. silt d. sandarrow_forwardPlants use ________ as an energy source to drive photostnthesis. a. sunlight b. hydrogen ions c. O2 d. CO2arrow_forwardWhich type of organism does NOT photosynthesize? a. Heterotrophs b. Producers c. Cyanobacteria d. Algae e. Autotrophsarrow_forward
- Question: _____ are primary producers that use inorganic molecules for their energy source. A. Litotrophs B. Heterotrophs C. Consumers D. Apex Predatorsarrow_forwardPlants cannot fix nitrogen, yet some plants do NOT need nitrogen from the soil. This is because a. of a symbiotic association with a bacterium that can fix nitrogen. b. these plants are the exceptions that can fix nitrogen. c. they have been infected by a parasitic virus that can fix nitrogen. d. they are able to obtain nitrogen from the air.arrow_forwardWhile sloshing around in the swampy wetlands of a nearby forest preserve, a small child notices a rotting tree branch covered in fungi. What are these organisms doing on this tree branch? (a) These are producers acquiring energy through photosynthesis. (b) These are consumers acquiring energy from the wood and releasing nutrients back to the earth. (c) These are decomposers acquiring energy from the wood and releasing nutrients back to the earth. (d) These are decomposers releasing nutrients back to the earth, but acquiring no energy for themselves in the process.arrow_forward
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